please could you advise on this

[wilsonk]

hi everyone please could you help me with this problem i have had a baxi combi boiler fitted its a duo tec he range and a creda aqua wave themostactic electric shower the shower will not control its temperature correctly it either scold's us or is freezing we did recently have a new pipe brought to the house from the street and payed privetly
to do this which we thought it would solve the water pressure but it hasnt we do mainly have showers and are in the process of redesigning bathroom as i am a designer please could any one help with this matter i would be very grateful regards kev